Platinum complexes and devices

A compound of Formula II2:

• wherein:
• L1 is substituted or unsubstituted:
• five-membered heterocyclyl, heteroaryl, carbene, or N-heterocyclic carbene,
• L2 is phenyl,
• A1 is O, S, S═O, SO2, Se, NR3, PR3, RP═O, CR1R2, C═O, SiR1R2, GeR1R2, BH, P(O)H, PH, NH, CR1H, CH2, SiH2, SiHR1, BH, or BR3,
• V1 is C, V2 is C, V3 is C, and V4 is N,
• each of Y1, Y2, Y3, and Y4 is independently C, N, O, or S,
• X is N,
• each of Rb, R1, R2, and R3 of Formula II2 is independently present or absent and if present, each of Rb, R1, R2, and R3 present represents mono-, di-, or tri-substitutions, and each Rb, R1, R2, and R3 present is independently substituted or unsubstituted and is selected from aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, deuterium, halogen, hydroxyl, thiol, nitro, cyano, amino, a mono- or di-alkylamino, a mono- or diaryl amino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, nitrile, isonitrile, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, sulfinyl, ureido, phosphoramide, mercapto, sulfo, carboxyl, hydrazino, and silyl, and wherein two or more of Rb are optionally linked together,
• each of R, R1, R2, and R3 of variable A1 is independently substituted or unsubstituted and is selected from hydrogen, aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, deuterium, halogen, hydroxyl, thiol, nitro, cyano, amino, a mono- or di-alkylamino, a mono- or diaryl amino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, nitrile, isonitrile, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, sulfinyl, ureido, phosphoramide, mercapto, sulfo, carboxyl, hydrazino, and silyl, and wherein two or more of R, R1, R2, and R3 are optionally linked together,
• each of
• is independently:
• each
• is independently:
• each of R, R1, and R2 of
• is independently substituted or unsubstituted and is selected from hydrogen, aryl, cycloalkyl, cycloalkenyl, heterocyclyl, heteroaryl, alkyl, alkenyl, alkynyl, deuterium, halogen, hydroxyl, thiol, nitro, cyano, amino, a mono- or di-alkylamino, a mono- or diaryl amino, alkoxy, aryloxy, haloalkyl, aralkyl, ester, nitrile, isonitrile, alkoxycarbonyl, acylamino, alkoxycarbonylamino, aryloxycarbonylamino, sulfonylamino, sulfamoyl, carbamoyl, alkylthio, sulfinyl, ureido, phosphoramide, mercapto, sulfo, carboxyl, hydrazino, and silyl, and wherein two or more of R, R1, R2, and R3 are optionally linked together.